Butterfly valve with elastic buffering and magnetic sealing functions

Abstract

The invention discloses a butterfly valve with elastic buffering and magnetic sealing, and relates to the technical field of butterfly valves, the butterfly valve comprises a valve rod mounted in a valve body, the side face of the valve rod is connected with a magnetic metal butterfly plate, the upper end of the valve rod is connected with a supporting ring, and a circular groove is formed in the valve body; the butterfly valve has the advantages that the first magnetic attraction plate and the magnetic metal butterfly plate are magnetically attracted, the first connecting plate is pulled, the elastic air bag deforms, the first sealing gasket and the magnetic metal butterfly plate are extruded and make close contact, sealing treatment is conducted, the magnetic metal butterfly plate is protected through the first sealing gasket, and the sealing effect is good. The magnetic metal butterfly plate is prevented from being in direct contact with the first magnetic suction plate, the sealing effect is ensured, meanwhile, through buffering of the first sealing gasket, the situation that demagnetization or deformation of the first magnetic suction plate is caused due to the fact that the magnetic metal butterfly plate impacts the first magnetic suction plate when the magnetic metal butterfly plate is closed can be effectively avoided, and the adsorption force is reduced can be effectively avoided, and the overall reliability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valves, in particular to a butterfly valve with elastic buffering and magnetic sealing. Background Art

[0002] The butterfly valve uses a circular butterfly plate as the opening and closing part. It has a simple structure and low flow resistance. It is widely used in low-pressure to medium-pressure pipelines in the fields of water supply and drainage, chemical industry, etc. After searching, the applicant found a magnetically sealed pneumatic butterfly valve with application number "202021654719.4", whose structure includes a valve body, a pipe, an inner gasket, an outer gasket, an external thread, a valve cover, a valve stem, a first sealing component, a pneumatic actuator, a butterfly plate, a second sealing component, a valve seat and a fitting device, wherein pipes are symmetrically provided at the left and right ends of the valve body, and the valve body and the pipe are integrally formed, the inner wall of the pipe is fixedly connected to the inner gasket, the outer side of the pipe is fixedly connected to the outer gasket, the outer side of the outer surface of the pipe is provided with an external thread, and the top end of the valve body is fixedly connected to the valve cover. The present invention has the following beneficial effects: by arranging a fitting device between the front and rear ends of the valve body wall and the butterfly plate, the beneficial effect of improving the sealing performance when closing by adding magnetic and mutual pressing components is achieved, and the beneficial effect of improving the stability of use and the sealing performance is improved by adopting internal and external double fixing and pressing components; However, the magnetic attraction mechanism in this device lacks a buffer mechanism. The impact generated when the butterfly plate closes directly facing the magnetic attraction mechanism will cause demagnetization or deformation, resulting in a decrease in adsorption force and thus a deterioration in the sealing effect. For this reason, we propose a butterfly valve with elastic buffering and magnetic sealing. Summary of the Invention

[0003] The object of the present invention is to provide a butterfly valve with elastic buffer and magnetic seal.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a butterfly valve with elastic buffer and magnetic seal, comprising a valve stem installed in a valve body, the side surface of the valve stem being connected to a magnetic metal butterfly plate, the upper end of the valve stem being connected to a support ring, the upper surface of the support ring being connected to a rubber pad, the upper surface of the rubber pad being connected to a magnetic metal plate, a second sealing pad being provided above the magnetic metal plate, the lower surface of the second sealing pad being connected to a second magnetic plate, the upper surface of the second sealing pad being connected to a second connecting plate, the upper surface of the second connecting plate being connected to an elastic pad, and the upper surface of the elastic pad being connected to the inner side surface of the valve body; A circular groove is provided in the valve body, an elastic airbag is connected to the side surface of the valve body, a first connecting plate is connected to the side surface of the elastic airbag, a first magnetic plate and a first sealing gasket are connected to the side surface of the first connecting plate, a limiting rod is connected to the outer side surface of the first connecting plate, and one end of the limiting rod is stuck in the circular groove.

[0005] As a further solution of the present invention: the upper end of the valve stem is mounted on a driving mechanism in a transmission mechanism, and the transmission mechanism is mounted on the valve body.

[0006] As a further solution of the present invention: the side surface of the valve body is rotatably connected to a rotation mechanism, and the other end of the rotation mechanism is provided with a thread.

[0007] As a further solution of the present invention: a slide groove is provided in the valve body, the slide groove is a square groove structure, and a connecting frame is provided in the slide groove.

[0008] As a further solution of the present invention: the connecting frame slides along the sliding groove, and the connecting frame is threadedly connected to the rotating mechanism.

[0009] As a further solution of the present invention: the side surface of the connection frame is fixedly connected to the limiting rod.

[0010] As a further solution of the present invention: the limiting rod slides along the circular groove.

[0011] As a further solution of the present invention: the first magnetic plate, the elastic airbag, the first connecting plate and the first sealing gasket form a "magnetic drive-elastic buffering-sealing protection" linkage function: when the first magnetic plate and the magnetic metal butterfly plate generate a magnetic attraction, the first connecting plate can be pulled to move toward the magnetic metal butterfly plate. During this process, the first connecting plate drives the elastic airbag to deform, and the deformation of the elastic airbag is used to achieve a buffering effect; at the same time, the first connecting plate synchronously drives the first sealing gasket to squeeze and contact the magnetic metal butterfly plate, and the sealing process is completed by the close fit of the first sealing gasket and the magnetic metal butterfly plate, and the first sealing gasket can isolate the magnetic metal butterfly plate from the first magnetic plate, avoiding the impact on the first magnetic plate when the magnetic metal butterfly plate is closed, preventing the first magnetic plate from being demagnetized or deformed, and ensuring the stability of the adsorption force of the first magnetic plate and the overall sealing effect.

[0012] As a further solution of the present invention: the rotating mechanism, connecting frame, limit rod and first connecting plate form an "adjustment drive-guide limit-sealing compensation" linkage function: when the rotating mechanism is rotated, its threaded end can drive the connecting frame threadedly connected to it to slide along the slide groove of the valve body, and the connecting frame synchronously drives the limit rod fixed to it to slide along the circular groove of the valve body during the sliding process. The cooperation between the limit rod and the circular groove provides a guide limit for the connecting frame to avoid tilting when the connecting frame slides; the connecting frame drives the first connecting plate to move synchronously through the limit rod, thereby changing the distance between the first connecting plate and the magnetic metal butterfly plate. When the first sealing gasket is worn and affects the sealing, the first connecting plate can be driven by the linkage adjustment to approach the magnetic metal butterfly plate, thereby re-achieving close contact between the first sealing gasket and the magnetic metal butterfly plate, and the sealing function can be maintained without replacing the first sealing gasket.

[0013] As a further solution of the present invention: the second magnetic plate, elastic pad, magnetic metal plate, second sealing pad and rubber pad form a "secondary magnetic attraction-elastic compensation-double sealing" linkage function: when the second magnetic plate and the magnetic metal plate generate magnetic attraction, the second connecting plate can be pulled to drive the second sealing pad to move toward the magnetic metal plate, and at the same time, the second connecting plate squeezes the elastic pad to deform, and the deformation of the elastic pad is used to achieve buffering compensation; after the second sealing pad moves with the second connecting plate, it fits tightly with the rubber pad on the support ring to form a seal. This sealing structure and the sealing structure formed by the first sealing pad and the magnetic metal butterfly plate together constitute a double sealing system, thereby improving the overall sealing performance; and when the magnetic metal butterfly plate has a slight deflection, the elastic pad and the elastic airbag can respectively perform adaptive compensation through their own deformation to ensure that the double sealing structure always maintains a stable sealing state.

[0014] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses the magnetic attraction between the first magnetic plate and the magnetic metal butterfly plate. During the process, the first connecting plate will be pulled to deform the elastic airbag, so that the first sealing gasket is squeezed against the magnetic metal butterfly plate. The first sealing gasket is in close contact with the magnetic metal butterfly plate for sealing. During the process, the magnetic metal butterfly plate is protected by the first sealing gasket to prevent the magnetic metal butterfly plate from directly contacting the first magnetic plate. While ensuring the sealing effect, the buffering of the first sealing gasket can effectively prevent the magnetic metal butterfly plate from impacting the first magnetic plate when closing, thereby causing demagnetization or deformation of the first magnetic plate, resulting in a decrease in adsorption force, thereby improving the overall reliability of the device. 2. The present invention enables the threaded end of the rotating mechanism to rotate along the threaded hole opened on the connecting frame, so that the connecting frame slides along the slide groove and the limiting rod slides along the circular groove, thereby changing the distance between the first connecting plate and the side surface of the magnetic metal butterfly plate. The first connecting plate and the first magnetic plate are both arc-shaped plate structures. When the magnetic metal butterfly plate is stuck during rotation, the first connecting plate and the first sealing gasket can be moved away from the magnetic metal butterfly plate. When the first sealing gasket is severely worn, the first connecting plate and the first sealing gasket can be moved close to the magnetic metal butterfly plate to ensure its overall sealing.

[0015] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of the device in an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a local structure of a device according to an embodiment of the present invention; Figure 3 for Figure 2 A in the middle is an enlarged structural diagram; Figure 4 This is a schematic cross-sectional view of a local structure of the internal structure of the device according to an embodiment of the present invention; Figure 5 for Figure 4 The enlarged structural diagram at B in the middle; Figure 6 for Figure 4 Enlarged structural diagram at point C in the middle.

[0017] In the figure: 1. valve body; 2. transmission mechanism; 3. elastic airbag; 4. first connecting plate; 5. first sealing gasket; 6. magnetic metal butterfly plate; 7. valve stem; 8. first magnetic plate; 9. elastic pad; 10. second connecting plate; 11. second sealing gasket; 12. second magnetic plate; 13. magnetic metal plate; 14. rubber pad; 15. support ring; 16. limit rod; 17. circular groove; 18. slide groove; 19. connecting frame; 20. rotating mechanism. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0019] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Please see the attached Figure 1 -Attached Figure 6 The present invention relates to a butterfly valve with elastic buffer and magnetic seal, comprising a valve stem 7 installed in a valve body 1, the side of the valve stem 7 is connected to the magnetic metal butterfly plate 6, the upper end of the valve stem 7 is connected to a support ring 15, the upper surface of the support ring 15 is connected to a rubber pad 14, the upper surface of the rubber pad 14 is connected to a magnetic metal plate 13, a second sealing gasket 11 is arranged above the magnetic metal plate 13, the lower surface of the second sealing gasket 11 is connected to a second magnetic plate 12, the upper surface of the second sealing gasket 11 is connected to a second connecting plate 10, the upper surface of the second connecting plate 10 is connected to an elastic pad 9, the upper surface of the elastic pad 9 is connected to the inner side of the valve body 1, and the inner surface of the valve body 1 is connected to the inner surface of the valve body 1. A circular groove 17 is provided, the inner side of the valve body 1 is connected to an elastic airbag 3, the side of the elastic airbag 3 is connected to a first connecting plate 4, the side of the first connecting plate 4 is connected to a first magnetic plate 8 and a first sealing gasket 5, the outer side of the first connecting plate 4 is connected to a limit rod 16, one end of the limit rod 16 is stuck in the circular groove 17, and when in use, the first magnetic plate 8 and the second magnetic plate 12 involved in the device are made of permanent magnets, the second magnetic plate 12 and the magnetic metal plate 13 are arc-shaped plate structures, the second connecting plate 10 and the elastic pad 9 are both annular plate structures, and the magnetic metal butterfly plate 6 is rotated to the attached position by rotating the valve stem 7. Figure 2 In the position shown, the first magnetic plate 8 is magnetically attracted to the magnetic metal butterfly plate 6. During the process, the first connecting plate 4 will be pulled toward the magnetic metal butterfly plate 6, causing the elastic airbag 3 to deform, and the first sealing gasket 5 to be squeezed with the magnetic metal butterfly plate 6. The first sealing gasket 5 is in close contact with the magnetic metal butterfly plate 6. In the process, the magnetic metal plate 13 provided on the support ring 15 is magnetically attracted to the second magnetic plate 12, and the second magnetic plate 12 cooperates to pull the second sealing gasket 11 and the second connecting plate 10 downward, causing the elastic pad 9 and the second sealing gasket 11 to deform, so that the lower surface of the second sealing gasket 11 is in close contact with the upper surface of the rubber pad 14, and sealing is achieved through the above.

[0021] In the first embodiment, the upper end of the valve stem 7 is mounted on the driving mechanism in the transmission mechanism 2, and the transmission mechanism 2 is mounted on the valve body 1. By starting the transmission mechanism 2, the valve stem 7 and the magnetic metal butterfly plate 6 can be driven to rotate; The limiting rod 16 slides along the circular groove 17 , and the first connecting plate 4 can be limited by the limiting rod 16 to prevent the first connecting plate 4 from tilting.

[0022] In the second embodiment, the valve body 1 is rotatably connected to a rotating mechanism 20 on its side, and a thread is provided on the other end of the rotating mechanism 20 so that the operator can rotate the rotating mechanism 20; The connecting frame 19 slides along the slide groove 18 and is threadedly connected to the rotating mechanism 20, so that the threaded end of the rotating mechanism 20 rotates along the threaded hole opened on the connecting frame 19; A chute 18 is provided in the valve body 1. The chute 18 is a square trough structure. A connecting frame 19 is provided in the chute 18 so that the connecting frame 19 slides along the chute 18. The side of the connecting frame 19 is fixedly connected to the limit rod 16, so that the limit rod 16 slides along the circular groove 17, which can change the distance between the first connecting plate 4 and the side of the magnetic metal butterfly plate 6. The first connecting plate 4 and the first magnetic plate 8 are both arc-shaped plate structures. When the magnetic metal butterfly plate 6 rotates and gets stuck, the first connecting plate 4 and the first sealing gasket 5 can be kept away from the magnetic metal butterfly plate 6, and when the first sealing gasket 5 is severely worn, the first connecting plate 4 and the first sealing gasket 5 can be brought close to the magnetic metal butterfly plate 6 to ensure its overall sealing.

[0023] In the present invention, the first magnetic plate 8, the elastic airbag 3, the first connecting plate 4 and the first sealing gasket 5 form a "magnetic drive-elastic buffer-sealing protection" linkage function: when the first magnetic plate 8 and the magnetic metal butterfly plate 6 generate a magnetic attraction, the first connecting plate 4 can be pulled to move toward the magnetic metal butterfly plate 6. During this process, the first connecting plate 4 drives the elastic airbag 3 to deform, and the deformation of the elastic airbag 3 is used to achieve a buffering effect; at the same time, the first connecting plate 4 synchronously drives the first sealing gasket 5 to squeeze and contact the magnetic metal butterfly plate 6, and the sealing process is completed by the close fit of the first sealing gasket 5 and the magnetic metal butterfly plate 6, and the first sealing gasket 5 can isolate the magnetic metal butterfly plate 6 and the first magnetic plate 8, thereby avoiding the impact of the magnetic metal butterfly plate 6 on the first magnetic plate 8 when it is closed, preventing the first magnetic plate 8 from being demagnetized or deformed, and ensuring the stability of the adsorption force of the first magnetic plate 8 and the overall sealing effect.

[0024] In the present invention, the rotating mechanism 20, the connecting frame 19, the limiting rod 16 and the first connecting plate 4 form an "adjustment drive-guide limit-seal compensation" linkage function: when the rotating mechanism 20 is rotated, its threaded end can drive the connecting frame 19 threadedly connected thereto to slide along the slide groove 18 of the valve body 1. During the sliding process of the connecting frame 19, the limiting rod 16 fixed thereto is simultaneously driven to slide along the circular groove 17 of the valve body 1. The cooperation between the limiting rod 16 and the circular groove 17 provides a guide limit for the connecting frame 19 to prevent the connecting frame 19 from tilting when sliding; the connecting frame 19 drives the first connecting plate 4 to move synchronously through the limiting rod 16, thereby changing the distance between the first connecting plate 4 and the magnetic metal butterfly plate 6. When the first sealing gasket 5 is worn and affects the sealing, the first connecting plate 4 can be driven by the linkage adjustment to drive the first sealing gasket 5 to approach the magnetic metal butterfly plate 6, thereby re-achieving close contact between the first sealing gasket 5 and the magnetic metal butterfly plate 6, and the sealing function can be maintained without replacing the first sealing gasket 5.

[0025] In the present invention, the second magnetic plate 12, elastic pad 9, magnetic metal plate 13, second sealing pad 11 and rubber pad 14 form a "secondary magnetic attraction-elastic compensation-double sealing" linkage function: when the second magnetic plate 12 and the magnetic metal plate 13 generate magnetic attraction, the second connecting plate 10 can be pulled to drive the second sealing pad 11 to move toward the magnetic metal plate 13, and at the same time, the second connecting plate 10 squeezes the elastic pad 9 to deform, and achieves buffer compensation with the help of the deformation of the elastic pad 9; after the second sealing pad 11 moves with the second connecting plate 10, it fits tightly with the rubber pad 14 on the support ring 15 to form a seal, and this sealing structure and the sealing structure formed by the first sealing pad 5 and the magnetic metal butterfly plate 6 together constitute a double sealing system to improve the overall sealing performance; and when the magnetic metal butterfly plate 6 has a slight deflection, the elastic pad 9 and the elastic airbag 3 can respectively perform adaptive compensation through their own deformation to ensure that the double sealing structure always maintains a stable sealing state.

[0026] Working principle: First, the first magnetic plate 8 is magnetically attracted to the magnetic metal butterfly plate 6. During the process, the first connecting plate 4 will be pulled to deform the elastic airbag 3, so that the first sealing gasket 5 is squeezed against the magnetic metal butterfly plate 6. The first sealing gasket 5 is in close contact with the magnetic metal butterfly plate 6 for sealing. During the process, the magnetic metal butterfly plate 6 is protected by the first sealing gasket 5 to prevent the magnetic metal butterfly plate 6 from directly contacting the first magnetic plate 8. While ensuring the sealing effect, the buffering of the first sealing gasket 5 can effectively prevent the magnetic metal butterfly plate 6 from impacting the first magnetic plate 8 when closing, thereby causing demagnetization or deformation of the first magnetic plate 8, resulting in a decrease in adsorption force, thereby improving the overall reliability of the device. At this point, the entire work flow is completed.

[0027] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0030] It is obvious to those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these changes still fall within the scope of protection of the present invention.

Claims

1. A butterfly valve with elastic buffer and magnetic seal, comprising a valve stem (7) installed in a valve body (1), the side of the valve stem (7) being connected to a magnetic metal butterfly plate (6), characterized in that: The upper end of the valve stem (7) is connected to a support ring (15), the upper surface of the support ring (15) is connected to a rubber pad (14), the upper surface of the rubber pad (14) is connected to a magnetic metal plate (13), a second sealing pad (11) is provided above the magnetic metal plate (13), the lower surface of the second sealing pad (11) is connected to a second magnetic plate (12), the upper surface of the second sealing pad (11) is connected to a second connecting plate (10), the upper surface of the second connecting plate (10) is connected to an elastic pad (9), and the upper surface of the elastic pad (9) is connected to the inner side surface of the valve body (1); A circular groove (17) is provided in the valve body (1), the inner side surface of the valve body (1) is connected to an elastic airbag (3), the side surface of the elastic airbag (3) is connected to a first connecting plate (4), the side surface of the first connecting plate (4) is connected to a first magnetic plate (8) and a first sealing gasket (5), and the outer side surface of the first connecting plate (4) is connected to a limiting rod (16), one end of the limiting rod (16) is clamped in the circular groove (17).

2. A butterfly valve with elastic buffer and magnetic seal according to claim 1, characterized in that: The upper end of the valve stem (7) is mounted on a drive mechanism within a transmission mechanism (2), and the transmission mechanism (2) is mounted on the valve body (1).

3. The butterfly valve with elastic buffer and magnetic seal according to claim 1, characterized in that: The valve body (1) is rotatably connected to a rotating mechanism (20) on its side, and the other end of the rotating mechanism (20) is provided with a thread.

4. A butterfly valve with elastic buffer and magnetic seal according to claim 3, characterized in that: A sliding groove (18) is provided in the valve body (1), the sliding groove (18) is a square groove-shaped structure, and a connecting frame (19) is provided in the sliding groove (18).

5. The butterfly valve with elastic buffer and magnetic seal according to claim 4, characterized in that: The connecting frame (19) slides along the sliding groove (18), and the connecting frame (19) is threadedly connected to the rotating mechanism (20).

6. The butterfly valve with elastic buffer and magnetic seal according to claim 5, characterized in that: The side surface of the connection frame (19) is fixedly connected to the limiting rod (16).

7. The butterfly valve with elastic buffer and magnetic seal according to claim 1, characterized in that: The limiting rod (16) slides along the circular groove (17).

8. The butterfly valve with elastic buffer and magnetic seal according to claim 1, characterized in that: When the first magnetic plate (8) and the magnetic metal butterfly plate (6) generate a magnetic attraction, the first connecting plate (4) is pulled to move toward the magnetic metal butterfly plate (6). During this process, the first connecting plate (4) drives the elastic airbag (3) to deform, and a buffering effect is achieved by means of the deformation of the elastic airbag (3); at the same time, the first connecting plate (4) synchronously drives the first sealing gasket (5) to be squeezed into contact with the magnetic metal butterfly plate (6), and the sealing process is completed by the close fit between the first sealing gasket (5) and the magnetic metal butterfly plate (6), and the first sealing gasket (5) isolates the magnetic metal butterfly plate (6) and the first magnetic plate (8).

9. The butterfly valve with elastic buffer and magnetic seal according to claim 5, characterized in that: When the rotating mechanism (20) is rotated, its threaded end can drive the connecting frame (19) threadedly connected thereto to slide along the slide groove (18) of the valve body (1). During the sliding process of the connecting frame (19), the limiting rod (16) fixed thereto is synchronously driven to slide along the circular groove (17) of the valve body (1). The cooperation between the limiting rod (16) and the circular groove (17) provides a guide limit for the connecting frame (19); the connecting frame (19) drives the first connecting plate (4) to move synchronously through the limiting rod (16), thereby changing the distance between the first connecting plate (4) and the magnetic metal butterfly plate (6). When the first sealing gasket (5) is worn and affects the sealing, the first connecting plate (4) drives the first sealing gasket (5) to approach the magnetic metal butterfly plate (6) through the linkage adjustment, thereby re-achieving the close contact between the first sealing gasket (5) and the magnetic metal butterfly plate (6).

10. The butterfly valve with elastic buffer and magnetic seal according to claim 1, characterized in that: When the second magnetic plate (12) and the magnetic metal plate (13) generate a magnetic attraction, the second connecting plate (10) is pulled to drive the second sealing gasket (11) to move toward the magnetic metal plate (13), and at the same time, the second connecting plate (10) squeezes the elastic gasket (9) to cause deformation, and buffer compensation is achieved with the help of the deformation of the elastic gasket (9); after the second sealing gasket (11) moves with the second connecting plate (10), it is tightly fitted with the rubber gasket (14) on the support ring (15) to form a seal, and this sealing structure and the sealing structure formed by the first sealing gasket (5) and the magnetic metal butterfly plate (6) together constitute a double sealing system.

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